Think-aloud protocols are a dominant method in usability testing. There is, however, only little empirical evidence on the actual validity of the method. This paper describes an experiment that compares concurrent and retrospective think-aloud protocols for a usability test of an online library catalogue. There were three points of comparison: usability problems detected, overall task performan...

BACKGROUND Effectiveness of a drug is a key concept dependent on efficacy, safety, and tolerability. Time to discontinuation of treatment is also representative of effectiveness. We investigated differences in treatment discontinuation among newly started second-generation antipsychotics in the clinical setting. METHODS Using a retrospective cohort study design, we screened all outpatients (n...

BACKGROUND The aim of this study was to evaluate the incidence, indications, and predictive factors of hospital readmission after open ventral hernia repair. METHODS A retrospective review of all open ventral hernia repairs at a single institution from 2000 to 2010 was performed to assess readmissions between 1 to 30, 1 to 90, and 91 to 365 days. Multivariate analysis was performed to identif...

Hemoglobinopathies, in particular sickle cell disease, is the most prevalent group of genetically transmitted diseases in the Brazilian population and should thus be treated as a public health problem. Many of these patients frequently present with complications and require emergency care at the blood bank Coordinator in Rio de Janeiro. This study was developed with the aim of characterizing th...

OBJECTIVE To clinically and radiologically evaluate patients who underwent arthroscopic surgical treatment for anterior shoulder instability by means of the Bankart technique, using metal anchors. METHODS This was a retrospective study on 49 patients who underwent arthroscopic repair of anterior shoulder instability between 2002 and 2007. The patients were evaluated using the Carter-Rowe scor...

Background Migraine prevention guidelines recommend oral prophylactic medications for patients with frequent headache. This study examined oral migraine preventive medication (OMPM) treatment patterns by evaluating medication persistence, switching, and re-initiation in patients with chronic migraine (CM). Methods A retrospective US claims analysis (Truven Health MarketScan® Databases) evaluate...

PURPOSE Biomarkers and genomic signatures represent potentially predictive tools for precision medicine. Validation of predictive biomarkers in prospective or retrospective studies requires statistical justification of power and sample size. However, the design of these studies is complex and the statistical methods and associated software are limited, especially in survival data. Herein, we ad...

g in usability research onal usability testing. There are various methodologies available when conducting research using eye trackers. This paper presents the results of a study aimed to compare the outcomes from four different retrospective think aloud (RTA) methods in a web usability study: an un‐cued RTA, a video cued RTA, a gaze plot cued RTA, and a gaze video cued RTA. Results indicate tha...

OBJECTIVE To make an analysis of the care of elderly in an Emergency Department of Orthopedics with the primary objective to know the percentage of elderly treated, their conditions of origin and level of accidental conditions, and examine possible comorbidities, evolution and mortality rate. METHODS Retrospective observational epidemiological study based on survey records of a tertiary hospi...